About Port Scanning
Port scanning is a method for determining which ports on a network are open and could be receiving or sending data. This tool uses TCP connect scanning to test connectivity to specific ports on target systems.
Common Ports:
22 (SSH)
23 (Telnet)
25 (SMTP)
53 (DNS)
80 (HTTP)
110 (POP3)
143 (IMAP)
443 (HTTPS)
993 (IMAPS)
995 (POP3S)